The JVC HD1 was a great projector when it was new, but compared to today's standard it has some big weaknesses (processing, brightness, color accuracy, movement resolution etc.) If it newer has been serviced and cleaned inside the light engine/light path, i guess the native 15000:1 contrast range has taken a dive and has been reduced over the last 10-15 years too. (they also had a weakness of getting lower light output due to some darkening layer buildup from the lamp in the light department)
Guess it is hard to compare two so different reflective vs direct view picture technologies. one thing is the screen size. (for every 2x increase of the picture diagonal, the screen area is increased by 4x) but I find the way in the day to day use of projector vs TV is very different so it is hard to compare them and choose one before the other.
The projector needs to be watched in a dark environment with as little light pollution from other light sources as possible, a direct-view LCD TV often needs some ambient light to reduce the imperfections of the backlight, and to reduce eye strain. The TV can be used 24/7 for many years on all sorts of sourses, that projector has a time-limited bulb that needs replacing every 500-2000 hours and the picture looks quite bad if the quality of source material is low.
If you have a dedicated cinema room I guess it should be better to go for a new projector upgrade in addition to a nice TV too...
